Young's modulus of Graphene: a molecular dynamics study

Details Young's modulus of Graphene: a molecular dynamics study Young's modulus of Graphene: a molecular dynamics study

2009-06-29

arxiv.org/abs/0906.5237v2

Phys. Rev. B 80, 113405 (2009)

Physics

Condensed Matter

Materials Science

accepted by PRB, brief report, discussion on Poisson ratio added

Scientific paper

10.1103/PhysRevB.80.113405

The Young's modulus of graphene is investigated through the intrinsic thermal vibration in graphene which is `observed' by molecular dynamics, and the results agree quite well with the recent experiment [Science \textbf{321}, 385 (2008)]. This method is further applied to show that the Young's modulus of graphene: 1. increases with increasing size and saturation is reached after a threshold value of the size; 2. increases from 0.95 TPa to 1.1 TPa as temperature increases in the region [100, 500]K; 3. is insensitive to the isotopic disorder in the low disorder region ($< 5%$), and decreases gradually after further increasing the disorder percentage.

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